Blacklight?

[3DModelerMan]

Is there a way to have an actuall "Black" light? I mean one that would take away from the scenes brightness? It would be usefull for faked shadows. You could put one as an area light and parent it to your character. If their isn't already, then how can I do one?

[geckoman]

Short answer: Shader

[3DModelerMan]

I meant for low end hardware that might not support shaders. But what's funny is that I just have been learning all about shaders, and you answer "use a shader" . Anyway would it work if I used negative RGB values? I can't seem to get them to go negative in Irredit .

[hybrid]

That would require non-normalized lighting, which is usually only available via shaders. What might be viable is projective texturing with signed additive combining.

[Munger]

I haven't seen a consumer level fixed-function GL implementation that supports negative lighting (not that I check often).